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    Re: Differences between GPS and WWV time
    From: Rodney Myrvaagnes
    Date: 2001 Jun 22, 1:49 PM

    On Fri, 22 Jun 2001 15:25:58 -0400, Smith_Peter{at}EMC.COM
    wrote:
    
    >However, as Dan Allen noted, receivers' internal clocks often drift,
    >and shouldn't be trusted until the unit is tracking.
    >
    
    Yes, but even if it is tracking, as Dan (I think) also
    noted, the display may not be updated fast enough. THis is
    more likely to be a problem with handheld devices, where
    battery life is a real consideration. Slowly clocked
    microprocessors use less power. If the unit is handling a
    bunch of other tasks, the screen update may wait.
    
    My old Traxar (1988) did not have this problem, but it ran
    through 6 AAs in 7 hours, and had a very simple display.
    
    It is annoying that one can't trust the display, even
    though you know that inside it knows the time to a tiny
    fraction of a second.
    
    Has anyone tested the fixed-mount versions of popular GPS
    families to see if they are better in this regard? I
    suspect the answer will be no, but they could take
    advantage of the ample power available from the boat or car
    battery.
    
    
    
    Rodney Myrvaagnes                   J36 Gjoa     rodneym---global.net
    Senior Editor           Electronic Products
    
    "Fireman saves pregnant squirrel"  -- Arizona Republic, Dec. 14, 2000
    

       
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